Re: [Detnet] The new d-ACH format
Greg Mirsky <gregimirsky@gmail.com> Thu, 18 November 2021 15:29 UTC
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From: Greg Mirsky <gregimirsky@gmail.com>
Date: Thu, 18 Nov 2021 07:29:17 -0800
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To: "Yangfan(Fan,IP Standards)" <shirley.yangfan@huawei.com>
Cc: DetNet WG <detnet@ietf.org>, DetNet Chairs <detnet-chairs@ietf.org>
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Subject: Re: [Detnet] The new d-ACH format
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Hi Fan, thank you for helping progress the DetNet OAM work. I have a couple of questions for the group: - Do you agree that the proposed d-ACH is a good and needed solution for the Service sub-layer OAM? - Do you support it being included in draft-ietf-detnet-mpls-oam and then discussed as a part of the WG document? Regards, Greg On Wed, Nov 17, 2021 at 6:26 PM Yangfan(Fan,IP Standards) < shirley.yangfan@huawei.com> wrote: > Hi Greg, > > > > I agree we need a thoroughly discussion to this new d-ACH format. Let’s > continue the discussion in biweekly OAM meetings. And I’d be very happy to > involve myself more on this work. > > One more comment to OAM meetings, maybe it is good to share the meeting > minutes in WG after each call, could be short but nice. I can do it as I > propose it and doesn’t bring burdens to others. > > Besides, I strongly encourage people to join this helpful meeting to > progress DetNet OAM as we have already reached many common understandings > on OAM requirements in previous months. > > > > Regards, > > Fan > > > > > > > > > > *From:* detnet [mailto:detnet-bounces@ietf.org] *On Behalf Of *Greg Mirsky > *Sent:* Thursday, November 18, 2021 7:54 AM > *To:* Yangfan(Fan,IP Standards) <shirley.yangfan@huawei.com> > *Cc:* DetNet WG <detnet@ietf.org>; DetNet Chairs <detnet-chairs@ietf.org> > *Subject:* Re: [Detnet] The new d-ACH format > > > > Hi Fan, > > thank you for your comments and questions. Please find my notes in-lined > below tagged GIM>>, > > Regards, > > Greg > > > > On Wed, Nov 17, 2021 at 2:26 AM Yangfan(Fan,IP Standards) < > shirley.yangfan@huawei.com> wrote: > > Hi Greg, > > > > Regarding the new d-ACH format, I have a few questions to share, hopefully > trigger more discussions. > > 1) I feel we need more specifications of Node ID. Using 20 bits to > indicate a Node in MPLS data plane, can I deduce it is an MPLS label? In > any MPLS data planes except SR-MPLS, there is no definition to use a label > to identify a node. If we want a format generic for all MPLS data planes, I > wonder whether node id is a good indicator? Whether 20 bits is enough? > > GIM>> I agree that the DetNet WG will have more discussions on the > definition of the Node ID field. I am looking forward to your participation > in these discussions. > > 2) I also noticed there is a session ID, but is only 4 bit length, > which I believe is way too short. Moreover, whether originator node ID and > session ID are duplicated here to identify an OAM session. To dig deeper, > DetNet OAM should be stateless or stateful? > > GIM>> Session ID field is only a tentative name. Would it help if we mark > it Reserved? > > 3) if we plans to take advantages of CFM y.1731 mechanisms, level > and flags are necessary but the length also needs further considerations. > > GIM>> It is not clear if DetNet OAM could benefit from re-using some > principles of Y.1731/CFM as the latter doesn't provide special support for > the Service sub-layer. > > > > Looking forward to further discussions. > > > > Regards, > > Fan > > > > > > > > > > *From:* detnet [mailto:detnet-bounces@ietf.org] *On Behalf Of *Greg Mirsky > *Sent:* Wednesday, November 17, 2021 4:55 AM > *To:* DetNet WG <detnet@ietf.org> > *Cc:* DetNet Chairs <detnet-chairs@ietf.org> > *Subject:* Re: [Detnet] The new d-ACH format > > > > Dear All, > > I hope you've recovered from the IETF-112 (timing on the West Coast was > brutal). > > Please share your thoughts, comments, and questions about the proposed new > format of d-ACH and whether you support including it and updating > draft-ietf-detnet-mpls-oam. > > > > Regards, > > Greg > > > > On Wed, Nov 10, 2021 at 5:14 AM Greg Mirsky <gregimirsky@gmail.com> wrote: > > Dear All, > > Bala'zs has presented the new d-ACH (DetNet Associated Channel Header) > format at the DetNet WG meeting. Earlier this week, the new d-ACH format > was presented at joint PALS, MPLS, and DetNet meeting and received several > positive comments. At the DetNet WG meeting, it was proposed to integrate > the technical part, the new format of d-ACH > <https://datatracker.ietf.org/doc/html/draft-varga-detnet-service-sub-layer-oam-01#page-6> into > the draft-ietf-detnet-mpls-oam > <https://datatracker.ietf.org/doc/draft-ietf-detnet-mpls-oam/>. > > Please, respond with the indication of your support or no support for the > proposed update of the WG document. > > > > Regards, > > Greg (as the Editor of draft-ietf-detnet-mpls-oam) > >
- [Detnet] The new d-ACH format Greg Mirsky
- Re: [Detnet] The new d-ACH format Greg Mirsky
- Re: [Detnet] The new d-ACH format Yangfan(Fan,IP Standards)
- Re: [Detnet] The new d-ACH format Greg Mirsky
- Re: [Detnet] The new d-ACH format Yangfan(Fan,IP Standards)
- Re: [Detnet] The new d-ACH format Greg Mirsky
- Re: [Detnet] The new d-ACH format Gyan Mishra